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Extra info for A Statistical Discussion of Sets of Precise Astronomical Measurements IV

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Use Mouse-2 in order to select the command you are interested in, or type and complete the rest of its name (you may use [TAB] again). Read about the function in the *Help* buﬀer that opens. • variables: Do the same after typing C-h v in order to see a variable’s value and documentation. • command apropos: Have you forgotten the exact name of a command? No problem... Type C-h a and a keyword. All commands related to the keyword you typed will appear in a buﬀer. Use C-h d for even more information.

6 prints the name of the product (1st column = $1) and the total value stored in the warehouse (2nd column = $2) × (4th column = $4). 85 > awk ’{ p r i n t $2^2 * sin ( $4 ) + exp ( $4 ) } ’ data The ﬁrst one calculates the total value of all products: The processing of each line results in the increment (+=) of the variable value by the product of the second and fourth ﬁelds. In the end (END{ ... }), the string Total= is printed, together with the ﬁnal value of the variable value. This is an easy way for computing the sum of the values calculated for each line.